Staphylococcus aureus small colony variants originating from the lower respiratory tract are associated with persistent pulmonary infection - Takeaways - MDSpire

Staphylococcus aureus small colony variants originating from the lower respiratory tract are associated with persistent pulmonary infection

  • By

  • Chao An

  • Shanjian Chen

  • Anqi Zheng

  • Lingqi Zheng

  • Chenshuo Luo

  • Bin Yang

  • Yulan Lin

  • May 12, 2026

  • 0 min

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  • 1

    Staphylococcus aureus small colony variants (SCVs) are linked to chronic pulmonary infections in cystic fibrosis patients globally.

  • 2

    In a study, 46 S. aureus SCVs were isolated from 2130 lower respiratory tract specimens of patients with Pseudomonas aeruginosa pneumonia.

  • 3

    More than half of the SCVs were methicillin-resistant, with a predominant genotype of ST1, indicating significant antibiotic resistance.

  • 4

    SCVs exhibited higher rates of immune evasion genes and stronger biofilm formation compared to normal phenotype S. aureus.

  • 5

    Patients with SCVs experienced longer hospital stays and more frequent treatments with fluoroquinolones and mechanical ventilation.

Original Source(s)

Staphylococcus aureus small colony variants originating from the lower respiratory tract are associated with persistent pulmonary infection

  • by Chao An, Shanjian Chen, Anqi Zheng, Lingqi Zheng, Chenshuo Luo, Bin Yang, Yulan Lin

  • May 12, 2026

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